<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>单选（点击选中，点击取消）</title>
    <script src="https://cdn.bootcss.com/vue/2.5.22/vue.js"></script>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        .btnBox{
            margin-top: 100px;
        }
        .btn{
            padding: 10px;
            width: 80px;
            height: 40px;
            background: #a8d7e6;
            border-radius: 5px;
            margin-left: 10px;
            cursor: pointer;
            border: 1px solid #ccc;
        }
        .isActive{
            background: pink;
        }
    </style>
</head>
<body>
    <div class="btnBox" >
        <span class="btn" v-for="(item,index) in list" :class="{ isActive:isChange == index}" @click="clickBtn(index)">{{item.name}}</span>
    </div>
</body>
<script>
    var app=new Vue({
        el:'.btnBox',
        data:{
           list:[
                {name:'title1', id:1},
                {name:'title2', id:2},
                {name:'title3', id:3},
            ],
            isChange:-1,
        },
        methods:{
            clickBtn(index){
                if(index!=this.isChange){
                    this.isChange = index;

                }else{
                    this.isChange = -1;

                }
            }
        },
    })
</script>
</html>

